chore(init): 初始化解忧商行项目并完成 Phase 0 基座

backend/internal/modules/adminrole/service.go

@@ -0,0 +1,68 @@
+package adminrole
+
+import (
+	"context"
+	"errors"
+)
+
+var ErrDependencyUnavailable = errors.New("dependency unavailable")
+
+type Service struct {
+	repo *Repository
+}
+
+func NewService(repo *Repository) *Service {
+	return &Service{repo: repo}
+}
+
+func (s *Service) List(ctx context.Context) ([]RoleDTO, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	return s.repo.List(ctx)
+}
+
+func (s *Service) FindByID(ctx context.Context, id uint64) (*RoleDTO, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	return s.repo.FindByID(ctx, id)
+}
+
+func (s *Service) Create(ctx context.Context, req CreateRoleRequest) (*RoleDTO, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	if req.Code == "" || req.Name == "" {
+		return nil, errors.New("code and name are required")
+	}
+	return s.repo.Create(ctx, req)
+}
+
+func (s *Service) Update(ctx context.Context, id uint64, req UpdateRoleRequest) (*RoleDTO, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	return s.repo.Update(ctx, id, req)
+}
+
+func (s *Service) Delete(ctx context.Context, id uint64) error {
+	if s.repo == nil {
+		return ErrDependencyUnavailable
+	}
+	return s.repo.Delete(ctx, id)
+}
+
+func (s *Service) AssignPermissions(ctx context.Context, roleID uint64, req AssignPermissionsRequest) error {
+	if s.repo == nil {
+		return ErrDependencyUnavailable
+	}
+	return s.repo.AssignPermissions(ctx, roleID, req.PermissionIDs)
+}
+
+func (s *Service) ListPermissions(ctx context.Context) ([]PermissionDTO, error) {
+	if s.repo == nil {
+		return nil, ErrDependencyUnavailable
+	}
+	return s.repo.ListPermissions(ctx)
+}